Exterior wiper head for drill pipe



FIG. 1 is a top and front perspective view of an exterior wiper head for drill pipe showing our new design;

FIG. 2 is a bottom and rear perspective view;

FIG. 3 is a side elevational view;

FIG. 4 is another side elevational view;

FIG. 5 is a rear elevational view;

FIG. 6 is a front elevational view;

FIG. 7 is a top plan view; and,

FIG. 8 is a bottom plan view thereof.

FIGS. 1 and 2 have been drawn on an enlarged scale with respect to FIGS. 3-8. 

The ornamental design for an exterior wiper head for drill pipe, as shown and described. 